src/media/base/wall_clock_time_source_unittest.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/test/simple_test_tick_clock.h"
   6 #include "media/base/wall_clock_time_source.h"
   7 #include "testing/gtest/include/gtest/gtest.h"
   8
   9 namespace media {
  10
  11 class WallClockTimeSourceTest : public testing::Test {
  12  public:
  13   WallClockTimeSourceTest() : tick_clock_(new base::SimpleTestTickClock()) {
  14     time_source_.SetTickClockForTesting(
  15         scoped_ptr<base::TickClock>(tick_clock_));
  16   }
  17   virtual ~WallClockTimeSourceTest() {}
  18
  19   void AdvanceTimeInSeconds(int seconds) {
  20     tick_clock_->Advance(base::TimeDelta::FromSeconds(seconds));
  21   }
  22
  23   int CurrentMediaTimeInSeconds() {
  24     return time_source_.CurrentMediaTime().InSeconds();
  25   }
  26
  27   void SetMediaTimeInSeconds(int seconds) {
  28     return time_source_.SetMediaTime(base::TimeDelta::FromSeconds(seconds));
  29   }
  30
  31   WallClockTimeSource time_source_;
  32
  33  private:
  34   base::SimpleTestTickClock* tick_clock_;  // Owned by |time_source_|.
  35
  36   DISALLOW_COPY_AND_ASSIGN(WallClockTimeSourceTest);
  37 };
  38
  39 TEST_F(WallClockTimeSourceTest, InitialTimeIsZero) {
  40   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  41 }
  42
  43 TEST_F(WallClockTimeSourceTest, InitialTimeIsNotTicking) {
  44   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  45   AdvanceTimeInSeconds(100);
  46   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  47 }
  48
  49 TEST_F(WallClockTimeSourceTest, InitialPlaybackRateIsOne) {
  50   time_source_.StartTicking();
  51
  52   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  53   AdvanceTimeInSeconds(100);
  54   EXPECT_EQ(100, CurrentMediaTimeInSeconds());
  55 }
  56
  57 TEST_F(WallClockTimeSourceTest, SetMediaTime) {
  58   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  59   SetMediaTimeInSeconds(10);
  60   EXPECT_EQ(10, CurrentMediaTimeInSeconds());
  61 }
  62
  63 TEST_F(WallClockTimeSourceTest, SetPlaybackRate) {
  64   time_source_.StartTicking();
  65
  66   time_source_.SetPlaybackRate(0.5);
  67   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  68   AdvanceTimeInSeconds(10);
  69   EXPECT_EQ(5, CurrentMediaTimeInSeconds());
  70
  71   time_source_.SetPlaybackRate(2);
  72   EXPECT_EQ(5, CurrentMediaTimeInSeconds());
  73   AdvanceTimeInSeconds(10);
  74   EXPECT_EQ(25, CurrentMediaTimeInSeconds());
  75 }
  76
  77 TEST_F(WallClockTimeSourceTest, StopTicking) {
  78   time_source_.StartTicking();
  79
  80   EXPECT_EQ(0, CurrentMediaTimeInSeconds());
  81   AdvanceTimeInSeconds(10);
  82   EXPECT_EQ(10, CurrentMediaTimeInSeconds());
  83
  84   time_source_.StopTicking();
  85
  86   AdvanceTimeInSeconds(10);
  87   EXPECT_EQ(10, CurrentMediaTimeInSeconds());
  88 }
  89
  90 }  // namespace media